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Magnetic nanorod demulsifier, preparation method thereof and method for treating nano-emulsion by using magnetic nanorod demulsifier

A technology of magnetic nanorods and demulsifiers, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of limiting the replacement and application expansion of magnetic nanoparticle demulsifiers

Active Publication Date: 2020-12-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the design concept of relying on the surface properties of magnetic nanoparticles for demulsification has severely limited the replacement of magnetic nanoparticle demulsifiers and their application expansion in complex and high-stability emulsions.

Method used

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  • Magnetic nanorod demulsifier, preparation method thereof and method for treating nano-emulsion by using magnetic nanorod demulsifier
  • Magnetic nanorod demulsifier, preparation method thereof and method for treating nano-emulsion by using magnetic nanorod demulsifier
  • Magnetic nanorod demulsifier, preparation method thereof and method for treating nano-emulsion by using magnetic nanorod demulsifier

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 11.6g FeCl 3 ·6H 2 O (M=270.3) and 5.56g FeSO 4 ·7H 2 O(M=278) in pass N 2 Dissolve in 250mL deionized water under the conditions to obtain iron salt solution, take 5.0g of polyethyleneimine with a molecular weight of 10000 (monomer M=43.06, n=0.116mol, N / Fe=1.84) and dissolve it in 50mL of distilled water to obtain polyethylene imine solution, in the continuous flow of N 2 Under the condition of stirring at 500rpm, add polyethyleneimine solution dropwise to the iron salt solution, mix well, and at 60°C water bath temperature, add 30mL concentrated ammonia water (25%) dropwise, stir for 2 hours and use a magnet to The solid particles in the reaction solution were separated, and the solid particles were washed with deionized water and redispersed into 50mL of deionized water. Added 250mL of glutaraldehyde solution with a concentration of 0.25%, stirred at 500rpm for 30min, and separated by magnetic field to obtain stable Magnetic nanorod demulsifier M-5, its morphol...

Embodiment 2

[0030] 11.6g FeCl 3 ·6H 2 O (M=270.3) and 5.56g FeSO 4 ·7H 2 O(M=278) in pass N 2 Dissolve in 250mL deionized water under the conditions to obtain an iron salt solution, take 4.0g of polyethyleneimine with a molecular weight of 10000 (monomer M=43.06, N / Fe=1.47) and dissolve it in 50mL of distilled water to obtain a polyethyleneimine solution. Keep on N 2Under the condition of stirring at 500rpm, add polyethyleneimine solution dropwise to the iron salt solution, mix well, and at 60°C water bath temperature, add 30mL concentrated ammonia water (25%) dropwise, stir for 2 hours and use a magnet to The solid particles in the reaction solution were separated, and the solid particles were washed with deionized water and redispersed into 50mL of deionized water. Added 250mL of glutaraldehyde solution with a concentration of 0.25%, stirred at 500rpm for 30min, and separated by magnetic field to obtain stable Magnetic nanorod demulsifier M-4, its morphology was characterized by TE...

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Abstract

The invention discloses a magnetic nanorod demulsifier, a preparation method thereof and a method for treating nano-emulsion by using the magnetic nanorod demulsifier, and belongs to the technical field of demulsifiers. The preparation method of the demulsifier comprises the steps that FeCl3. 6H2O and FeSO4. 7H2O are dissolved in deionized water under the N2 introduction condition to obtain a ferric salt solution, the molar ratio of Fe < 3 + > to Fe < 2 + > is 2.15, polyethyleneimine is taken and dissolved in distilled water to obtain a polyethyleneimine solution, the molecular weight of polyethyleneimine is 10000, and the molar ratio of N to Fe is not lower than 1.47; the polyethyleneimine solution is added into the ferric salt solution dropwise while continuously introducing N2 and stirring, concentrated ammonia water is dropwise added at the water bath temperature of 50-80 DEG C, stirring is carried out to react for 1-4 hours, solid particles in the reaction solution are separated by using a magnet, the solid particles are cleaned with deionized water, re-dispersing the solid particles into the deionized water, a glutaraldehyde solution is added, and stirring, uniformly mixing and magnetic field separation are carried out to obtain the demulsifier. The demulsifier prepared by the preparation method disclosed by the invention can be used for efficiently demulsifying the nano-emulsion of which the mass ratio of the surfactant to the oil is 0-0.909.

Description

technical field [0001] The invention relates to a magnetic nanorod demulsifier, a preparation method thereof and a method for treating nanoemulsions thereof, belonging to the technical field of demulsifiers. Background technique [0002] The mechanical and electronic industry is an important part of China's equipment manufacturing industry and an important foundation for China's national economic development. In the current adjustment and progress of China's economic structure, it has huge development potential and innovative prospects. At the same time, problems such as environmental pollution risks caused by waste emulsions generated in the production process and product consumption of the mechanical and electronic industries have become increasingly prominent. [0003] Compared with general oily wastewater or emulsion wastewater, the waste emulsion produced by the mechanical and electronic industry has typical characteristics: the oil droplet size is nanometer level, bel...

Claims

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Application Information

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IPC IPC(8): B01D17/05
CPCB01D17/047
Inventor 熊永娇彭开铭黄翔峰李乐雪吴宝强贺梦凡刘佳陆丽君
Owner TONGJI UNIV
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